Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54313a39003f280…

MALICIOUS

PDF

77.3 KB Created: 2021-09-06 23:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 672ed0b9c7b88727f2e3d6dd1a3d1ac2 SHA-1: 9353b252bfd067045a905c4281642a51e3109d45 SHA-256: c54313a39003f280ab825c01c21237767a048aed30da22be4314c021169bb36e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which host other PDF files. This behavior is indicative of a link farm designed to distribute malicious content or lead users to phishing sites. The presence of ClamAV detection and ML classification further supports its malicious nature. No scripts were extracted, but the structure suggests a malicious document lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=arabic+alphabet+cards+pdf PDF link annotation
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/733b0c3020bbfb0bda2f38fbe8ac4644/96300853222.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210613_99516B24A8FFD90F.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/zakelujipe.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609781a122f15---gawojete.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/42174932211.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16113a1e069315---ponidezikon.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/fulepenifo.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/eis3ifs6gd05l0bmjgm8an1hon/getasezid.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dae9130b6---54761745839.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/86458353204.pdfIn PDF document text
    • https://granchefpremiumfood.it/file/1161273964.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d52c2c8e6e0---89857393921.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/8hfiqham059mbkelaoftlfpg3o/ziguxakabivi.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/57044675102.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083106b7dfe7---bonop.pdfIn PDF document text
    • http://plise.org/userfiles/file/juborapijimef.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/osl5cv6hidn18436jhgm5kc5is/tiwigefeb.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05d75ccde9---50007907520.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/181555408059.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ltuj5mnd8d7n79bigcrk4ardv1/fupupezanozutizap.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/07/files/210726095515.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A7 17880 bytes
SHA-256: acff8befc04addbb9f29d55a676a4c18bd6183ec4b8c1a45239bdcce350fb47f
font_01_sfnt_off0000f7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FE 10616 bytes
SHA-256: c853a2c5e512f6814059b42aec6343b22899fe5d55a389cb871809d7b2e82e6e
font_02_sfnt_off00011030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.